Three-knife punching unit, copper strip automatic punching machine and processing method

Abstract

The invention relates to the field of processing equipment manufacturing, and in particular to a three-knife punching unit, an automatic copper strip punching machine and a processing method, comprising a frame, a bottom template and a punching drive unit are fixed on the frame, a plurality of guide pillars are fixed on the bottom template, a cutting template, a notch template, a punching template and a top template are provided on the guide pillars, the bottom template is provided with an operating channel for the copper strip to enter, the bottom surface of the operating channel is provided with waste holes for waste to fall off, comprising a cutting knife bar, a notch knife bar and a punching knife bar, the cutting template, the notch template, the punching template and the top template are all provided with rod holes for the cutting knife bar, the notch knife bar and the punching knife bar to pass through; the advantage is that the punching, notch punching and cutting mechanisms are integrated into a set of devices through a linkage drive unit, the punching, notch punching and cutting processes can be completed continuously, and multiple transfer and transportation of the copper strip is not required, the efficiency is high, the scrap rate is low, and the floor space and cost of the equipment are greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of processing equipment manufacturing, and in particular to a three-knife punching unit, a copper strip automatic punching machine and a processing method. Background Art

[0002] One of the panel materials of the electromagnetic chuck is copper strip, which is output from a copper strip reel and punched into different lengths according to different specifications. At the same time, holes and notches need to be punched on the cut copper strip.

[0003] At present, the cutting, punching and notching of copper strips need to be done manually by punching with a punch die from a punching machine, and then manually punching and notching. The above steps produce a lot of waste and are inefficient. There are also automated conveying, punching, notching and cutting equipment on the market, but the punching, notching and cutting parts are separated structures, the equipment occupies a large area and has a high purchase cost.

[0004] Based on this, this case is brought forward. Summary of the invention

[0005] One of the purposes of the present invention is to provide a three-knife punching unit, which can complete the three operations of punching, notching and cutting in the same unit to solve the above-mentioned defects.

[0006] A three-knife punching unit comprises a frame, a bottom template and a punching driving part are fixed on the frame, a plurality of guide posts are fixed on the bottom template, a cutting template, a notch template, a punching template and a top template are arranged on the guide posts, an operation channel for copper strip to enter is arranged on the bottom template, a waste hole for waste to fall off is arranged on the bottom surface of the operation channel, the cutting template, the notch template and the punching template are all slidably connected with the guide posts, and an elastic reset structure is arranged between the guide posts, and the top template is fixed to the guide posts;

[0007] It comprises a cutting knife bar, a notching knife bar and a punching knife bar. The cutting template, the notching template, the punching template and the top template are all provided with a rod hole through which the cutting knife bar, the notching knife bar and the punching knife bar can pass. The cutting knife bar is matched with the rod hole gap on the notching template, the punching template and the top template and is fixed with the rod hole on the cutting template. The notching knife bar is matched with the rod hole gap on the cutting template, the punching template and the top template and is fixed with the rod hole on the notching template. The punching knife bar is matched with the rod hole gap on the cutting template, the notching template and the top template and is fixed with the rod hole on the punching template. The lower ends of the cutting knife bar, the notching knife bar and the punching knife bar are provided with a knife head that can enter the working channel.

[0008] The cutting knife rod, the incision knife rod and the punching knife rod all pass through the top template upwards and are fixed with a horizontal mounting plate; the action end of the punching drive unit is provided with a liftable pressure block, one end of the horizontal mounting plate is located below the pressure block, and the other end is fixed with a linkage drive unit, and a slider is provided on the horizontal mounting plate, and the linkage drive unit is used to drive the slider to enter or move away from the bottom of the pressure block.

[0009] Furthermore, a limiting template is provided on the guide column, the limiting template is adjacent to the bottom template and is located above the bottom template, and the limiting template is detachably fixedly connected to the guide column to control the height of the working channel;

[0010] The limiting template is provided with rod holes for the cutting knife rod, the incision knife rod and the punching knife rod to pass through, and the rod holes on the limiting template are clearance-matched with the cutting knife rod, the incision knife rod and the punching knife rod.

[0011] The second object of the present invention is to provide an automatic copper strip punching machine, comprising a feeding unit, a conveying unit and the three-knife punching unit, wherein the feeding unit outputs the copper strip from a copper strip reel to the conveying unit, and the conveying unit outputs the copper strip to the three-knife punching unit, and the three-knife punching unit performs punching, notching and cutting operations on the copper strip.

[0012] Furthermore, the feeding unit comprises a feeding base, on which a turntable, a turntable driving unit, a turntable driving controller and a tensioning adjustment mechanism are provided, and the turntable is used to place the copper belt reel;

[0013] The tension adjustment mechanism includes a vertical rod and a rotating seat rotatably connected to the upper end of the vertical rod. The upper end of the vertical rod is provided with an upper limit switch and a lower limit switch matched with the rotating seat. The rotating seat is fixed with a vertically arranged swing arm 1 and a swing arm 2, wherein a counterweight is fixed to the end of the swing arm 1 away from the rotating seat, and the end of the swing arm 2 away from the rotating seat is a ring-shaped structure. The copper belt output by the copper belt reel passes through the ring-shaped structure of the swing arm 2 and enters the conveying unit;

[0014] The output ends of the upper limit switch and the lower limit switch are connected to the input end of the turntable drive controller, and the output end of the turntable drive controller is connected to the input end of the turntable drive unit. The turntable drive controller controls the start and stop of the turntable drive unit according to the feedback signals of the upper limit switch and the lower limit switch.

[0015] Furthermore, the counterweight block is provided with a screw hole, the screw hole is provided with a tightening screw, and the swing arm 1 and the counterweight block are fixedly connected by the tightening screw.

[0016] Furthermore, the rotating seat is provided with a penetrating swing arm second mounting hole, the rotating seat is provided with a screw hole, and the screw hole is provided with a tightening screw. After the swing arm second passes through the swing arm second mounting hole, it is fixedly connected to the rotating seat by the tightening screw.

[0017] Furthermore, the conveying unit includes a clamp conveying part, which includes several pairs of clamp groups, two mountain plates and a clamp driving part. The clamp driving part is used to drive the clamp group to rotate. Several pairs of the clamp groups are installed between the two mountain plates and arranged along the conveying direction of the copper strip. The clamp group includes a lower clamp and an upper clamp. The copper strip is clamped by the upper and lower clamps and conveyed forward.

[0018] Furthermore, the mountain plate is provided with a clamping degree fine-tuning mechanism at the upper clamping cylinder, and the clamping degree fine-tuning mechanism includes a fine-tuning plate, a transition plate and an adjustment seat from bottom to top, and a notch for inserting the fine-tuning plate is provided on the upper edge of the mountain plate, and both ends of the upper clamping cylinder are mounted on the fine-tuning plate through bearings;

[0019] The two ends of the transition plate are provided with fixing screw holes located on both sides of the notch, and fixing bolts fixedly connected to the mountain plate are arranged in the fixing screw holes. A lower adjustment screw hole is arranged in the middle of the transition plate, and a tightening through hole is arranged between the lower adjustment screw hole and the fixing screw hole. A rubber rod is arranged in the tightening through hole, and the lower end of the rubber rod tightens the fine-tuning plate, and the upper end protrudes out of the tightening through hole.

[0020] An upper adjusting screw hole is provided in the middle of the adjusting seat, and an adjusting bolt which can be screwed into the lower adjusting screw hole is provided in the upper adjusting screw hole. The adjusting seat is provided with tightening grooves opposite to the tightening through hole on both sides of the upper adjusting screw hole, and the rubber rod can enter the tightening groove, and the depth of the tightening groove is less than the height of the rubber rod protruding from the tightening through hole.

[0021] Furthermore, the conveying unit includes a limiting portion located between the clamp conveying portion and the loading unit, the limiting portion includes a horizontal limiting plate and a plurality of vertical limiting plates fixed on the horizontal limiting plate, an upper limiting roller and a lower limiting roller are provided between two adjacent vertical limiting plates, and the copper belt horizontally enters between the two adjacent vertical limiting plates and passes between the upper and lower limiting rollers.

[0022] The third object of the present invention is to provide a processing method based on the above-mentioned copper strip automatic punching machine, comprising the following steps:

[0023] The copper strip enters the working channel of the three-knife punching unit;

[0024] If punching operation is required at this time, the linkage driving part on the punching knife bar drives the slider to move to the bottom of the pressing block, the pressing block is pressed down, and the punching knife bar is driven to punch down through the slider to complete the punching;

[0025] If a notch punching operation is required at this time, the linkage drive unit on the notch cutter bar drives the slider to move below the pressure block, the pressure block presses down, and the notch cutter bar is driven to punch down through the slider to complete the notch;

[0026] If cutting operation is required at this time, the linkage driving part on the cutting knife bar drives the slider to move below the pressure block, the pressure block is pressed down, and the cutting knife bar is driven to punch down through the slider to complete the cutting.

[0027] The advantages of the present invention are:

[0028] 1. The punching, notching and cutting mechanisms are integrated into a set of devices through the linkage drive unit, which can continuously complete the punching, notching and cutting processes without the need for multiple transfers of the copper strip. It has high efficiency, low scrap rate, and greatly reduces the floor space and cost of the equipment.

[0029] 2. The heavy hammer tensioning device and the limit switch are used to realize the tension adjustment and the automatic start and stop control of the turntable. That is, during the punching operation, the copper belt stops conveying and the tension decreases, and the turntable can automatically stop the output of the copper belt. After the punching operation is completed, the copper belt continues to be conveyed, the tension increases, and the turntable automatically continues to output the copper belt;

[0030] 3. Although a tensioning device is provided, there is still a certain distance between the loading unit and the conveying unit due to operational requirements. During this distance, the conveyed copper belt is not necessarily conveyed horizontally, and may flip obliquely, causing the copper belt entering the conveying unit to have a certain offset or deformation. By providing a limiting portion between the clamping conveying portion and the loading unit, it is ensured that the copper belt is conveyed horizontally and centrally into the clamping conveying portion, thereby ensuring the quality of copper belt processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the three-dimensional structure of the automatic copper strip punching machine in the embodiment;

[0032] Figure 2 A schematic diagram of the three-dimensional structure of the feeding unit in the embodiment;

[0033] Figure 3 is a schematic side view of a limiting portion of a conveying unit in an embodiment;

[0034] Figure 4 A schematic diagram of the three-dimensional structure of the cartridge conveying portion of the conveying unit in the embodiment;

[0035] Figure 5 A cross-sectional schematic diagram of a clamping degree fine-adjusting mechanism in a chuck conveying portion in an embodiment;

[0036] Figure 6 Schematic diagram of the three-dimensional structure of the three-knife punching unit in the embodiment;

[0037] Figure 7 It is a schematic diagram of the assembly of the parts related to the punching operation in the three-knife punching unit in the embodiment;

[0038] Figure 8 It is a schematic diagram of the assembly of the parts related to the cutting operation in the three-knife punching unit in the embodiment;

[0039] Fig. 9 It is a schematic diagram of the assembly of the parts related to the cutting operation in the three-knife punching unit in the embodiment;

[0040] Fig.10 The schematic diagram is a construction diagram of the elastic reset structure between the cutting template, the notching template, the punching template and the guide column in the three-knife punching unit.

[0041] Description of symbols

[0042] 1- Copper strip;

[0043] 2-feeding unit, 201-feeding base, 202-turntable, 203-vertical pole, 204-rotating seat, 205-swing arm 1, 206-swing arm 2, 207-counterweight;

[0044] 3- conveying unit, 301- limiting part, 3011- horizontal limiting plate, 3012- vertical limiting plate, 3013- upper limit roller, 3014- lower limit roller, 302- clamping cylinder conveying part, 3021- mountain plate, 3022- clamping cylinder driving part, 3023- upper clamping cylinder, 3024- lower clamping cylinder, 3025- fine adjustment plate, 3026- transition plate, 3027- adjusting seat, 3028- fixing bolt, 3029- rubber rod, 30210- top pressing groove, 30211- adjusting bolt;

[0045] 4-three-knife punching unit, 401-frame, 402-bottom template, 403-punching drive unit, 404-guide column, 405-cutting template, 406-incision template, 407-punching template, 408-top template, 409-operating channel, 410-waste hole, 411-elastic reset structure, 412-cutting knife rod, 413-incision knife rod, 414-punching knife rod, 415-rod hole, 416a-cutting knife Rod cutter head, 416b-cutting knife rod head, 416c-punching knife rod head, 417-horizontal mounting plate, 418-pressing block, 419a-linkage driving part on cutting knife rod, 419b-linkage driving part on cutting knife rod, 419c-linkage driving part on punching knife rod, 420a-slider on cutting knife rod, 420b-slider on cutting knife rod, 420c-slider on punching knife rod, 421-limiting template. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the embodiments. It should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" herein are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0047] This embodiment provides a copper strip automatic punching machine, such as Figure 1 As shown, it includes a loading unit 2, a conveying unit 3 and a three-knife punching unit 4. The loading unit 2 outputs the copper strip from the copper strip reel to the conveying unit 3, and the conveying unit 3 outputs the copper strip to the three-knife punching unit 4. The three-knife punching unit 4 punches, notches and cuts the copper strip.

[0048] like Figure 2 As shown, the feeding unit 2 includes a feeding base 201, on which a turntable 202, a turntable drive unit, a turntable drive controller and a tension adjustment mechanism are provided, and the turntable 202 is used to place a copper belt reel. The tension adjustment mechanism includes a vertical rod 203, the lower end of which is fixed to the feeding base 201, and the upper end of which is rotatably connected to a rotating seat 204. The upper end of the vertical rod 203 is also provided with an upper limit switch and a lower limit switch (not shown in the figure) that cooperate with the rotating seat 204. The rotating seat 204 is fixed with a vertically arranged swing arm 1 205 and a swing arm 2 206, wherein a counterweight 207 is fixed to the end of the swing arm 1 205 away from the rotating seat 204, and the end of the swing arm 206 away from the rotating seat 204 is a ring-shaped structure, which is convenient for the copper belt to pass through and transmits the tension force to the swing arm 2 206. The copper belt output by the copper belt reel passes through the ring-shaped structure of the swing arm 2 206 and enters the conveying unit 3. In this embodiment, the output end of the upper limit switch and the output end of the lower limit switch are connected to the input end of the turntable drive controller, and the output end of the turntable drive controller is connected to the input end of the turntable drive unit. The turntable drive controller controls the start and stop of the turntable drive unit according to the feedback signals of the upper limit switch and the lower limit switch to realize the start and stop of the turntable 202.

[0049] The start and stop control process of the turntable of the feeding unit 2 is as follows:

[0050] When the turntable 202 is not started, and the conveying unit 3 starts to convey the copper belt, the copper belt between the feeding unit 2 and the conveying unit 3 will be tightened, and the swing arm 206 will be gradually raised under the drive of the copper belt. When the swing arm 206 is raised to a certain angle, the upper limit switch will be triggered. At this time, the upper limit switch sends a feedback signal to the turntable drive controller, and the turntable drive controller controls the turntable drive unit to start, and the turntable 202 rotates to output the copper belt from the copper belt disk;

[0051] When the three-knife punching unit 4 is performing the punching operation, the conveying unit 3 stops conveying the copper strip. At this time, the turntable 202 continues to rotate, and the copper strip between the feeding unit 2 and the conveying unit 3 will relax. At this time, the swing arm 206 will gradually lower under the drive of the copper strip. When the swing arm 206 is lowered to a certain angle, the lower limit switch will be triggered. At this time, the lower limit switch sends a feedback signal to the turntable drive controller. The turntable drive controller controls the turntable drive part to stop, and the turntable 202 stops rotating. The copper strip is no longer output to the conveying unit 3.

[0052] The copper belt tensioning adjustment can be achieved by using a heavy hammer tensioning device, that is, by swinging and adjusting the swing arm 2. The automatic start and stop control of the turntable 202 can also be achieved by using the cooperation of the heavy hammer tensioning device and the limit switch. In order to facilitate the adjustment of the counterweight on the swing arm 1 205, a screw hole is provided on the counterweight block 207 of this embodiment, and a tightening screw is provided on the screw hole. The swing arm 1 205 and the counterweight block 207 are fixedly connected by the tightening screw. By screwing the tightening screw, the counterweight block 207 can be increased or decreased. Further, a penetrating swing arm 2 mounting hole is provided on the rotating seat 204, and a screw hole is provided on the rotating seat 204, and a tightening screw is provided on the screw hole. After the swing arm 206 passes through the swing arm 2 mounting hole, it is fixedly connected to the rotating seat 204 by the tightening screw. After such a design, the length of the swing arm 206 can be adjusted by loosening the tightening screw here.

[0053] like Figure 4 As shown, the conveying unit 3 includes a clamp conveying part 302, which includes a plurality of pairs of clamp groups, two mountain plates 3021 and a clamp driving part 3022. The clamp driving part 3022 is used to drive the clamp group to rotate. The plurality of pairs of clamp groups are installed between the two mountain plates 3021 and arranged along the conveying direction of the copper strip. The clamp group includes a lower clamp 3024 and an upper clamp 3023. The copper strip is clamped and conveyed forward by the upper and lower clamps 3023 and 3024. In order to facilitate the adjustment of the clamping force of the clamp group on the copper strip, the clamp conveying part 302 of this embodiment is also provided with a clamping degree fine-tuning mechanism at the upper clamp 3023.

[0054] like Figure 5As shown, the clamping degree fine-tuning mechanism includes, from bottom to top, a fine-tuning plate 3025, a transition plate 3026 and an adjustment seat 3027; the upper edge of the mountain plate 3021 is provided with a notch for the fine-tuning plate 3025 to be inserted (the depth of the notch is slightly greater than the height of the fine-tuning plate 3025, so as to facilitate the adjustment of the clamping force); the two ends of the upper clamp 3023 are mounted on the fine-tuning plate 3025 through bearings; the two ends of the transition plate 3026 are provided with fixing screw holes located on both sides of the top surface of the notch (screw holes corresponding to the fixing screw holes are also provided on the mountain plate), and fixing bolts 3028 fixedly connected to the mountain plate 3021 are provided in the fixing screw holes; a lower adjusting screw hole is provided in the middle of the transition plate 3026, and a screw hole is provided through the transition plate 3026 to adjust the clamping force. The ferry plate 3026 is provided with a tightening through hole between the lower adjusting screw hole and the fixing screw hole, and a rubber rod 3029 is provided in the tightening through hole. The lower end of the rubber rod 3029 tightens the fine-tuning plate 3025, and the upper end protrudes from the tightening through hole; the middle part of the adjusting seat 3027 is provided with an upper adjusting screw hole located just above the lower adjusting screw hole, and the upper adjusting screw hole is provided with an adjusting bolt 30211 that can be screwed into the lower adjusting screw hole. The adjusting seat 3027 is provided with tightening pressing grooves 30210 opposite to the tightening through hole on both sides of the upper adjusting screw hole. The rubber rod 3029 can enter the tightening pressing groove 30210, and the depth of the tightening pressing groove 30210 is less than the height of the rubber rod 3029 protruding from the tightening through hole. When the clamping tightness needs to be adjusted, the tightness of the connection between the adjustment seat 3027 and the transition plate 3026 can be adjusted by screwing the adjusting bolt 30211, thereby changing the downward clamping force applied to the rubber rod 3029 by the clamping groove 30210. The downward clamping force of the fine-tuning plate 3025 is changed by the rubber rod 3029, thereby achieving fine-tuning of the clamping force between the upper clamp 3023 and the lower clamp 3024.

[0055] Due to operational requirements, there is still a certain distance between the loading unit 2 and the conveying unit 3. During this distance, the copper belt is not necessarily conveyed horizontally, but may be turned obliquely, causing the copper belt entering the conveying unit 3 to have a certain offset or deformation. Figure 1 As shown, the conveying unit 3 includes a limiting portion 301 located between the clamp conveying portion 302 and the loading unit 2, and the limiting portion 301 includes a horizontal limiting plate 3011 and a plurality of vertical limiting plates 3012 fixed on the horizontal limiting plate 3011, as shown in FIG. Figure 3 As shown, an upper limit roller 3013 and a lower limit roller 3014 are provided between two adjacent vertical limit plates 3012, and the copper strip enters horizontally between the two adjacent vertical limit plates 3012 and passes between the upper and lower limit rollers 3013 and 3014. This ensures that the copper strip is transported horizontally and centered into the clamping barrel transporting portion 302, thereby ensuring the quality of copper strip processing.

[0056] like Figures 6 to 10As shown, the three-knife punching unit 4 includes a frame 401 with a rectangular frame structure, on which a bottom template 402 and a punching drive unit 403 are fixed, and on which four guide posts 404 are fixed, and on which the guide posts 404 are provided with a limit template 421, a cutting template 405, a notch template 406, a punching template 407 and a top template 408 from bottom to top, respectively. An operating channel 409 is formed between the bottom template 402 and the limit template 421, which is just enough for the copper strip to enter, and a waste hole 410 (the waste hole 410 runs through the workbench below) is provided on the bottom surface of the operating channel 409 for waste to fall off, and the cutting template 405, the notch template 406 and the punching template 407 are all slidably connected to the guide posts 404, and an elastic reset structure 411 is provided between the guide posts 404, and the limit template 421 and the top template 408 are both fixedly connected to the guide posts 404. Fig.10 As shown, this embodiment lists an elastic reset structure 411, that is, the reset of the relevant template is achieved through spring force. Of course, other forms of structures can also be used to achieve the reset of the relevant template.

[0057] The three-knife punching unit 4 also includes a cutting knife bar 412, a cutting knife bar 413 and a punching knife bar 414. The limiting template 421, the cutting template 405, the cutting template 406, the punching template 407 and the top template 408 are all provided with rod holes 415 for the cutting knife bar 412, the cutting knife bar 413 and the punching knife bar 414 to pass through. The cutting knife bar 412 is clearance-matched with the rod holes 415 on the limiting template 421, the cutting template 406, the punching template 407 and the top template 408, and is fixed with the rod hole 415 on the cutting template 405. 13 is clearance matched with the rod hole 415 on the limiting template 421, the cutting template 405, the punching template 407, and the top template 408, and is fixed with the rod hole 415 on the cutting template 406. The punching knife rod 414 is clearance matched with the rod hole 415 on the limiting template 421, the cutting template 405, the cutting template 406, and the top template 408, and is fixed with the rod hole 415 on the punching template 407. The lower ends of the cutting knife rod 412, the cutting knife rod 413 and the punching knife rod 414 are provided with knife heads 416a, 416b, 416c that can enter the working channel 409. The cutting knife rod 412, the incision knife rod 413 and the punching knife rod 414 all pass through the top template 408 upwards, and are all fixed with a horizontal mounting plate 417. The action end of the punching drive unit 403 is provided with a liftable pressure block 418. One end of the horizontal mounting plate 417 is located below the pressure block 418, and the other end is fixed with a linkage driving unit 419a, 419b, 419c. The horizontal mounting plate 417 is provided with sliders 420a, 420b, 420c. The linkage driving units 419a, 419b, 419c are used to drive the sliders 420a, 420b, 420c to enter or move away from the bottom of the pressure block 418.

[0058] Since the linkage operation processes of the three types of tool bars are similar, this embodiment takes the punching operation as an example to explain the operation process of the tool bar in detail.

[0059] like Figure 7 As shown, when the copper strip enters the operation channel 409 and is in place, the system determines that punching operation is required at this time, and the linkage drive unit 419c is started, so that the slider 420c slides to the bottom of the pressure block 418, and the punching drive unit 403 controls the pressure block 418 to press down. The pressure block 418 moves downward through the slider 420c and the horizontal mounting plate 417 to make the punching knife rod 414 move downward. During the downward movement of the punching knife rod 414, the incision template 406 and the cutting template 405 do not move. The punching template 407 moves downward with the punching knife rod 414, and at the same time, the punching knife rod 414 drives the lower end of the knife head 416c to punch downward to complete the punching of the copper strip, and the waste punched out is discharged through the waste hole 410. After the punching is completed, the punching drive unit 403 and the linkage drive unit 419c are reset. After the downward pressure is lost, the punching template 407 is reset upward under the action of the elastic reset structure 411, and the reset of the punching template 407 drives the punching knife rod 414 to rise and reset.

[0060] The linkage control process of the three-blade punching unit 4 is as follows:

[0061] The copper strip enters the working channel 409 of the three-knife punching unit 4;

[0062] If punching operation is required at this time, the linkage driving part 419c on the punching knife bar 414 drives the slider 420c to move to the bottom of the pressing block 418, and the pressing block 418 presses down, and the punching knife bar 414 is driven to punch down through the slider 420c to complete the punching;

[0063] If a notch punching operation is required at this time, the linkage driving part 419b on the notch bar 413 drives the slide block 420b to move below the pressing block 418, and the pressing block 418 presses down, driving the notch bar 413 to punch down through the slide block 420b to complete the notch;

[0064] If cutting operation is required at this time, the linkage driving part 419a on the cutting knife rod 412 drives the slider 420a to move to the bottom of the pressing block 418, and the pressing block 418 is pressed down, and the cutting knife rod 412 is driven to punch down through the slider 420a to complete the cutting.

[0065] Preferably, the position-limiting template 421 and the guide column 404 are detachably fixedly connected in this embodiment to control the height of the working channel 409. The detachable fixing structure can be tightened by a screw, and the position-limiting template 421 can be moved up and down by loosening the screw, thereby changing the height of the working channel 409 to adapt to copper strips of different specifications.

[0066] The above embodiments are only used to explain the concept of the present invention, rather than to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A copper strip automatic punching machine, characterized in that: It includes a feeding unit, a conveying unit and a three-knife punching unit. The feeding unit outputs the copper strip from the copper strip reel to the conveying unit, and the conveying unit outputs the copper strip to the three-knife punching unit. The three-knife punching unit performs punching, notching and cutting operations on the copper strip. The three-knife punching unit comprises a frame, a bottom template and a punching driving part are fixed on the frame, a plurality of guide posts are fixed on the bottom template, a cutting template, a notching template, a punching template and a top template are arranged on the guide posts, an operation channel for the copper strip to enter is arranged on the bottom template, a waste hole for waste to fall off is arranged on the bottom surface of the operation channel, the cutting template, the notching template and the punching template are all slidably connected with the guide posts, and an elastic reset structure is arranged between the template and the guide posts, and the top template is fixed to the guide posts; It comprises a cutting knife bar, a notching knife bar and a punching knife bar. The cutting template, the notching template, the punching template and the top template are all provided with a rod hole through which the cutting knife bar, the notching knife bar and the punching knife bar can pass. The cutting knife bar is matched with the rod hole gap on the notching template, the punching template and the top template and is fixed with the rod hole on the cutting template. The notching knife bar is matched with the rod hole gap on the cutting template, the punching template and the top template and is fixed with the rod hole on the notching template. The punching knife bar is matched with the rod hole gap on the cutting template, the notching template and the top template and is fixed with the rod hole on the punching template. The lower ends of the cutting knife bar, the notching knife bar and the punching knife bar are provided with a knife head that can enter the working channel. The cutting knife bar, the notching knife bar and the punching knife bar all pass through the top template upwards and are all fixed with a horizontal mounting plate; the action end of the punching driving part is provided with a lifting block, one end of the horizontal mounting plate is located below the block, and the other end is fixed with a linkage driving part, the horizontal mounting plate is provided with a slider, and the linkage driving part is used to drive the slider to enter or move away from the bottom of the block; The guide column is provided with a limit template, which is adjacent to the bottom template and located above the bottom template, and the limit template is detachably fixedly connected to the guide column to control the height of the working channel; the limit template is provided with rod holes for the cutting knife rod, the incision knife rod and the punching knife rod to pass through, and the rod holes on the limit template are clearance-matched with the cutting knife rod, the incision knife rod and the punching knife rod; The feeding unit comprises a feeding base, on which a turntable, a turntable driving unit, a turntable driving controller and a tensioning adjustment mechanism are provided, and the turntable is used to place a copper belt disk; the tensioning adjustment mechanism comprises a vertical rod and a rotating seat rotatably connected to the upper end of the vertical rod, and the upper end of the vertical rod is provided with an upper limit switch and a lower limit switch cooperating with the rotating seat, and the rotating seat is fixed with a vertically arranged swing arm 1 and a swing arm 2, wherein a counterweight is fixed to the end of the swing arm 1 away from the rotating seat, and the end of the swing arm 2 away from the rotating seat is a ring-shaped structure, and the copper belt output by the copper belt disk passes through the ring-shaped structure of the swing arm 2 and enters the conveying unit; the output ends of the upper limit switch and the lower limit switch are connected to the input end of the turntable driving controller, and the output end of the turntable driving controller is connected to the input end of the turntable driving unit, and the turntable driving controller controls the start and stop of the turntable driving unit according to the feedback signals of the upper limit switch and the lower limit switch; The conveying unit includes a clamp conveying part, which includes a plurality of pairs of clamp groups, two mountain plates and a clamp driving part, the clamp driving part is used to drive the clamp group to rotate, the plurality of pairs of clamp groups are installed between the two mountain plates and arranged along the conveying direction of the copper strip, the clamp group includes a lower clamp and an upper clamp, and the copper strip is clamped by the upper and lower clamps and conveyed forward; The conveying unit includes a limiting portion located between the clamp conveying portion and the loading unit, the limiting portion includes a horizontal limiting plate and a plurality of vertical limiting plates fixed on the horizontal limiting plate, an upper limiting roller and a lower limiting roller are provided between two adjacent vertical limiting plates, and the copper belt horizontally enters between the two adjacent vertical limiting plates and passes between the upper and lower limiting rollers.

2. The automatic copper strip punching machine according to claim 1, characterized in that: The counterweight block is provided with a screw hole, and the screw hole is provided with a tightening screw, and the swing arm 1 and the counterweight block are fixedly connected by the tightening screw.

3. The automatic copper strip punching machine according to claim 1, characterized in that: The rotating seat is provided with a penetrating swing arm second mounting hole, the rotating seat is provided with a screw hole, and the screw hole is provided with a tightening screw. After the swing arm second passes through the swing arm second mounting hole, it is fixedly connected to the rotating seat through the tightening screw.

4. The automatic copper strip punching machine according to claim 1, characterized in that: The mountain plate is provided with a clamping degree fine-tuning mechanism at the upper clamping cylinder, and the clamping degree fine-tuning mechanism includes a fine-tuning plate, a transition plate and an adjustment seat from bottom to top. The upper edge of the mountain plate is provided with a notch for the fine-tuning plate to be inserted, and both ends of the upper clamping cylinder are mounted on the fine-tuning plate through bearings; The two ends of the transition plate are provided with fixing screw holes located on both sides of the notch, and fixing bolts fixedly connected to the mountain plate are arranged in the fixing screw holes. A lower adjustment screw hole is arranged in the middle of the transition plate, and a tightening through hole is arranged between the lower adjustment screw hole and the fixing screw hole. A rubber rod is arranged in the tightening through hole, and the lower end of the rubber rod tightens the fine-tuning plate, and the upper end protrudes out of the tightening through hole. An upper adjusting screw hole is provided in the middle of the adjusting seat, and an adjusting bolt which can be screwed into the lower adjusting screw hole is provided in the upper adjusting screw hole. The adjusting seat is provided with tightening grooves opposite to the tightening through hole on both sides of the upper adjusting screw hole, and the rubber rod can enter the tightening groove, and the depth of the tightening groove is less than the height of the rubber rod protruding from the tightening through hole.

5. A processing method of the copper strip automatic punching machine according to any one of claims 1 to 4, comprising the following steps: The copper strip enters the working channel of the three-knife punching unit; If punching operation is required at this time, the linkage driving part on the punching knife bar drives the slider to move to the bottom of the pressing block, the pressing block is pressed down, and the punching knife bar is driven to punch down through the slider to complete the punching; If a notch punching operation is required at this time, the linkage drive unit on the notch cutter bar drives the slider to move below the pressure block, the pressure block presses down, and the notch cutter bar is driven to punch down through the slider to complete the notch; If cutting operation is required at this time, the linkage driving part on the cutting knife bar drives the slider to move below the pressure block, the pressure block is pressed down, and the cutting knife bar is driven to punch down through the slider to complete the cutting.

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